Stovepipe-joint.



P. H. GEAHAM. sTovEPm, 10m: APPLICATION FILED JUNE 21, 1908; Patented Feb. 14,1911.

onrrsn strains PATENT OFFICE.

rs' rnrcx H. GRAHAM, saonannn'ro, CALIFORNiA, ASSIGNOR or ONEHALF TO JOHN H. gamma, 01* course, cauronma to encircle the meeting ends of two pipe sections and having clamping means 01 drawing and holding tlie'said two sections together and primarily my invention has for 1 its object to provide an improved constructic-n of means for joining and clamping two i j pipevsecticns together, of a simple and economical nature, especially designed for making a neat joint, capable of being readily apphed,and by which the'ltwo sections can be securely wined'and. yet have independentrotary movement so "dint either or both sections can be readily adjusted for connecting with elbows of (ther pipe see- 'tions or lines as conditions may make do- My invention consists in a stove pipe "joint. thatcnibodies the peculiar construction and novel arrangement of parts, all of which will be hereinafter fully explained,

{ g specifically pointed. out in the appended claims andillastrated in the accompanying drawing, in which Figure l, is a perspective 'view showing :niy improved pipe joint as applied for use.

';:5 Fig. 2, is. a detail horizontal section on a somewhat enlarged scale, taken on the line 22 on F Fig. 3, is a cross section on the line on Fig. 2. Fig. 4, is a detail view that shows the ends of the clamping 4'3 band mounted on the pipe ends and separated, the clamp screw and not being also shown separated. Fig. 5, is a detail view of one end of one pipe section, before the reinforcing wire receiving head is formed thereon. Fig. 6, is a detail view of the upper or joint ends of the pipe section in their blank shape. v I

In carrying out my inventiomthe pipe sections are bent upfrom a Blank form in so the usual manner but the opposite ends of the said blank form are shaped as shown in Fig. 6 from which it will be seen the opposite portions I -1 of the blank or body 1 that form the longitadrally extended interloclnng heads stop short oi die end of Specification of Letters Patent. llipllcatior filed June 21, 1908. Serial Ho. 503,358.

, theblank 'so that thesaid end when bent over 4 STOVEPIPE-JOIHT.

Patented Feb. 1 1, 1911.

forms a transverse bend of uniform shape in cross section and. having at. uninterrupted smooth peripheral surface when bent over the reinforcing wire best-shown in 69 Figs.-2, 3 ahd 4, from which it will also be seen that by reason of forming the end of the pipe section body, as stated,'.the solid head or rifn X is'at'a point be ond the interlocked beads or ends l-1, the reasonfor which will presently appear, By reason of constructing the pipe sections in the manner shown and described, the ends of each section are in the natnre'of a solid rin1,-each forming a solid bearing'to oppose its mate.

For conveniently joining the pipe formed as stated, I provide a ring or band 3 of spring metal, concaved in cross seetionnmd of sufiicient width to snugly fit o er the rims or beads :r-a: of the adjacent ends of apair of pipe sections, the edges being tiigied out at right angles to form bearing flanges 30- adapted to rest solidly against the pipe sections, the concavity of the said band and the bearing flanges being relatively such that the band when drawn together. in the manner presently explained, will snugly and firmly hold the two solid beaded ends of the two pipe sections, but by reason of the. g5 flanges 30 hearing solid against the'said pipe sections the band 3 is held from binding; so tightly against the beads of the pipe sections as to prevent each' section having ro tary movement with respect to each other 90. and the clamping band. 'Ifhe band 3 carries at each end a solid metal right angled bracket piece 4, the foot portion 40 of which is curved to fit on the external surface of the ends of the band, and the said bracket is riveted to the end of the band 3, its opposite edges being also bent :t right angles to form bearing surfaces 41 to solidly engage the body of the pipe section. Each bracket plate 4 has an outwardly projected ear 42 and each of said cars is provided with an aperture -i3-for the passage of a clamp screw 5 that receives the clamp nut 6, it being obvious that by tightening up the screw 5 the band will be closely drawn over the adjacent solid and beaded ends of thetwo pipe sections and secnrethem firmly to each other, By reason of the edges of the band terminating in flat bearing flanges the pressure of the band ivill be against the body 2 1 semen of the pipe sections and not in frietionally tight engagement- Will] the bended ends of the said pipes, suchfconnection therefore, 5 while serving as a convenient and effective 5 means toroining the pipe ends, also forms 5 By forming the pipe ends as stated and shown, :r oint or connectioncan be made practically as strong and durable as any 15 other portion of the pipe and which effectively prevents the escape of smoke and sparks and as the pipe ends are rigidly held on each other it lSllllP-lxSilJlG for them to telescope, the pipe time: being at all times 29 held in properverLu-al n'inement.

Having thus described my invention, what I claims is:

1. In a. pipe joint, the combination with a pair of pipe sections 0.2 eh having an annular 25 head at its end and a reinforcement ring in said beads, said pipe sections being placed end to end with their heads in con .tact, each of said pipe sections haying a longitudinal seam ternjnating short ol such 30 beads to leave a space between said longi tudinal seams and the respective beads; of a bind. coneuved in cross section to extend around and inelose the contacting heads of the pipe section, the opposite edges of the band having llat bearing surfaces held in a direction parallel to the longitudinal axis of the pipe sections, said longitudinal seams terminating adjacent to said band, an angle piece secured to each end of the hnmhh screw holt passing through said anglepieres, and nut on said holt, one ralge of said nut lyiur in COIlltlC-t with the band part of said angle piece to prevent turning of said nut, substantially as shown and described.

2. In n pipe joint, the combination with a pair of pipe sections each having an annular bend at its end and a reinforoeit-aentring in Said heads said pipe sections being placed end to end i t their hands in contact, each of said pi; zmziiets having a longitudinal mun terminathg short. of such heads to leave a spare hetween said longituoinsl seams and the. respective heads; of a band concaved in cross section to extend around and inciose the contacting beads of the pipesl-ctions, the opposite edges of the hand having llai bearing surfaces held in a direction.

1 sections, said longitudinal seams terminating adjacent to said band, an angle piece secured to eaeh end of the hand, :1 screw bolt passing through said angle pieces, a nut on said bolt, one edge of said nut lying in contact with the band part of said angle piece to prevent, lllji'lllll'! of said nut, said angle pieces lying n; a inement with said longitudinal seams and adapted to be drawn toward one another by said bolt and nut at the space between said longitudinal seams and said bends. L

PATRICK H. GRAHAM,

itnesses:

.-\LVA LINDSTROM, GILBERT 1. Bones. 

